build(deps): update dependency org.codehaus.mojo:flatten-maven-plugin to v1.3.0 (#507)

* build(deps): update dependency org.codehaus.mojo:flatten-maven-plugin to v1.3.0

* error prone to be in expected list.

* flatten-plugin-check as required

Co-authored-by: Tomo Suzuki <[email protected]>

Author: renovate-bot

.github/sync-repo-settings.yaml

@@ -40,6 +40,7 @@ branchProtectionRules:
     - "dependencies (11, java-spanner)"
     - "dependencies (11, java-storage)"
     - "dependencies (11, java-pubsub)"
+    - "flatten-plugin-check"
     - "build (8, java-trace, test)"
     - "build (8, java-trace, lint)"
     - "build (8, java-trace, clirr)"

.kokoro/java-storage-v2.9.3-expected-flattened-dependencies.txt

@@ -13,6 +13,7 @@ com.google.cloud:google-cloud-core-http:jar:2.8.0:compile
 com.google.cloud:google-cloud-core:jar:2.8.0:compile
 com.google.code.findbugs:jsr305:jar:3.0.2:compile
 com.google.code.gson:gson:jar:2.9.0:compile
+com.google.errorprone:error_prone_annotations:jar:2.14.0:compile
 com.google.guava:failureaccess:jar:1.0.1:compile
 com.google.guava:guava:jar:31.1-jre:compile
 com.google.guava:listenablefuture:jar:9999.0-empty-to-avoid-conflict-with-guava:compile

pom.xml

@@ -243,7 +243,7 @@
         <plugin>
           <groupId>org.codehaus.mojo</groupId>
           <artifactId>flatten-maven-plugin</artifactId>
-          <version>1.2.7</version>
+          <version>1.3.0</version>
           <executions>
             <!-- enable flattening -->
             <execution>